One of the great joys – and by joys, I mean unnerving possibilities – of the interweb lies in the inevitability that sooner or later, someone from your past is going to post something online that makes you feel as if a bucket of frigid water has been poured over your head. Case in point: my mind was already in a somewhat contemplative and nostalgia-ready state as a result of Sarah’s post yesterday – and by nostalgic, I mean struggling to recall any of the vague details of pre-college life that I’ve largely (successfully) blocked from my memory – when I checked my e-mail this morning. And discovered that I’d been tagged in a Facebook photo.